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Radiator Hose

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  • 29-10-2008 12:19pm
    #1
    TechieEddy
    Closed Accounts Posts: 185 ✭✭


    Had a wee accident with the radiator hose. Provided I get the correct hose for the car, it should be simply a matter of disconnecting the old one and reconnecting the new one.
    Is there anything else that needs to be done? apart from remembering not to leave it hanging on the fan belt :)


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    #2
    DublinDilbert
    Registered Users Posts: 5,379 ✭✭✭DublinDilbert


    Yep you'll need to get the correct replacement hose, and re-fit....

    Depending on where you current hose is cut/connected, you might need to drain some coolant from the radiator to avoid a major spillage when you disconnect the ends.

    You will typically also need to know how to bleed the system on your... usually its very straight forward. Post the make / model and people here will advise on how to bleed it.

    Also as part of the bleeding make sure the internal heater is turned on, and fully to hot.

    If it has Jublie clips, don't over tighten them as they'll just eat into the hose when it gets warm...

    Finally make sure to top up with the correct Anti-freeze or coolant... again if you supply the make/model of vehicle we'll be able to advise further...


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    #3
    TechieEddy
    Closed Accounts Posts: 185 ✭✭TechieEddy


    Thanks for the reply. It's a 99' 206 1.1 ltre.
    Picking up the hose from a dealer later. The cut is in the middle of the hose.


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    #4
    DublinDilbert
    Registered Users Posts: 5,379 ✭✭✭DublinDilbert


    In any system the bleeder(s) will always be at the highest point(s) in the system. I have never bled a 206, done a 305 about a year ago after replacing the thermostat.

    It's probably similar to the 305 i did... The main bleeder for the engine is on the top of the thermostat housing. There was also a bleeder on the pipes going to the internal heater.

    In these cause the heater is so high, and the radiator so low in the front it can be difficult to bleed, so some people recommend raising the front of the car, either on a curb or a hill to help. Although i never had to do this.

    After you've bled the cooling system, warm the car up... .always check that the internal heater is working.... then when the car is at temperature the main radiator should start working... you'll know the main radiator is working when it starts to get warm, and the bottom hose coming form it starts to heat up....


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    #5
    TechieEddy
    Closed Accounts Posts: 185 ✭✭TechieEddy


    Thanks a million. Will give it a shot later.


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    #6
    crosstownk
    Registered Users Posts: 12,863 ✭✭✭✭crosstownk


    Look around for other hoses - remove the lowest one, if you're lucky this will be the bottom rad hose. Drain all the coolant. Refit the damaged hose and the lower one you disconnected. Refill the system with plain water. Run the engine to normal operating temperature and check for leaks - leave the expansion bottle cap off. Once the fan has kicked in once or twice replace the expansion bottle cap. Normally it would be good to drive the car for a couple of days with just water in the system but the weather is very cold at the moment so correct coolant would be advisable if your going to leave the car lying overnight.

    Once your happy there are no leaks drain it again and fill with the correct proportion of coolant. And run the engine to full temperature again and recheck for leaks. Some leaks may only be apparent after refitting the expansion bottle cap due to increased system pressure. Be careful of scalding water/coolant of the engine is hot.
    Untitled Image




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    #7
    DublinDilbert
    Registered Users Posts: 5,379 ✭✭✭DublinDilbert


    crosstownk wrote: »
    Look around for other hoses - remove the lowest one, if you're lucky this will be the bottom rad hose. Drain all the coolant. Refit the damaged hose and the lower one you disconnected. Refill the system with plain water. Run the engine to normal operating temperature and check for leaks - leave the expansion bottle cap off. Once the fan has kicked in once or twice replace the expansion bottle cap. Normally it would be good to drive the car for a couple of days with just water in the system but the weather is very cold at the moment so correct coolant would be advisable if your going to leave the car lying overnight.

    Once your happy there are no leaks drain it again and fill with the correct proportion of coolant. And run the engine to full temperature again and recheck for leaks. Some leaks may only be apparent after refitting the expansion bottle cap due to increased system pressure. Be careful of scalding water/coolant of the engine is hot.

    Ummmm I think on most modern cooling systems the fan will not kick in, until the cooling system is pressurised.... Most cars run a 2 speed fan, low speed will kick in a 105C and the high speed at 112C ( approx )... to get the water/coolant to temperatures > 100C it will need to be under pressure...

    A good initial indicator of how your cooling system is working is the internal heater in the car.


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